# Scaling a cluster with multiple indices
**URL:** https://discuss.elastic.co/t/scaling-a-cluster-with-multiple-indices/142977
**Category:** Elasticsearch
**Created:** [August 3, 2018, 9:25pm UTC](https://discuss.elastic.co/t/scaling-a-cluster-with-multiple-indices/142977 "2018-08-03T21:25:07Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@username123](https://discuss.elastic.co/u/username123)
#### Post date: [August 3, 2018, 9:25pm UTC](https://discuss.elastic.co/t/scaling-a-cluster-with-multiple-indices/142977/1 "2018-08-03T21:25:08Z")
Hi, I have an elastic 2.3 legacy cluster that I have to scale up to prepare for a significant seasonal load.
I observe that there are 2 indices on the cluster with the following configs:
```auto
Index P:
"number_of_shards": "4"
"number_of_replicas": "4"
green open P 4 4 591635702 3550680 357.8gb 71.6gb
Index S:
"total_shards_per_node": "1"
"number_of_shards": "6",
"number_of_replicas": "4",
green open S 6 4 252376492 51806564 788.2gb 160.7gb
```
Current size of active nodes that actually keep the data is 31. Since I have to scale this up my idea is to add nodes until every shard of every index had its own node. Some sources say that if I have several shards of the same index on the same nodes, the querying happens in a serial fashion which may slow things down. I don't know if the same is true for different indexes, but I would assume so (please let me know).
Current node type : `16 vCPUs, 60 GB memory, 375 GB SSD`
What other action I could potentially take in order to improve performance? Giving the cluster an additional 19 nodes may be pretty expensive, I want to make sure that I explore other options before I do that.
Let me know if there are other settings that might be relevant here.
Thanks!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 31, 2018, 9:25pm UTC](https://discuss.elastic.co/t/scaling-a-cluster-with-multiple-indices/142977/2 "2018-08-31T21:25:12Z")
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